High Accuracy Ultralow IQ, 300 mA,
anyCAP Low Dropout Regulator
ADP3333
FEATURES
FUNCTIONAL BLOCK DIAGRAM
High accuracy over line and load: 0.8% @ 25°C,
1.8% over temperature
Q1
IN
OUT
THERMAL
PROTECTION
ADP3333
Ultralow dropout voltage: 230 mV (maximum) @ 300 mA
Requires only COUT = 1.0 µF for stability
anyCAP is stable with any type of capacitor (including MLCC)
Current and thermal limiting
Low noise
Low shutdown current: < 1 µA
R1
CC
g
DRIVER
m
R2
SD
BAND GAP
REF
2.6 V to 12 V supply range
−40°C to +85°C ambient temperature range
Ultrasmall 8-lead MSOP package
GND
Figure 1.
APPLICATIONS
Cellular phones
PCMCIA cards
Personal digital assistants (PDAs)
DSP/ASIC supplies
GENERAL DESCRIPTION
The ADP3333 is a member of the ADP333x family of precision
low dropout (LDO) anyCAP® voltage regulators. Pin compatible
with the MAX8860, the ADP3333 operates with a wider input
voltage range of 2.6 V to 12 V and delivers a load current up to
300 mA. ADP3333 stands out from other conventional LDOs
with a novel architecture and an enhanced process that enables
it to offer performance advantages over its competition. Its
patented design requires only a 1.0 μF output capacitor for
stability. This device is insensitive to output capacitor equivalent
series resistance (ESR) and is stable with any good quality
capacitor, including ceramic (MLCC) types for space-restricted
applications. The ADP3333 achieves exceptional accuracy of
0.8% at room temperature and 1.8% over temperature, line,
and load variations. The dropout voltage of the ADP3333 is
only 140 mV (typical) at 300 mA. This device also includes a
safety current limit, thermal overload protection, and a shutdown
feature. In shutdown mode, the ground current is reduced to
less than 1 μA. The ADP3333 has ultralow quiescent current,
70 μA (typical) in light load situations.
ADP3333
4
1
NC
V
2
IN
IN
V
OUT
OUT
+
C
IN
1µF
+
C
OUT
1µF
SD
7
GND
3
ON
NC = NO CONNECT
OFF
Figure 2. Typical Application Circuit
Rev. B
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